Final answer:
The patient should be administered Nitroglycerin to relieve chest pain and improve blood flow to the heart.
Step-by-step explanation:
The patient should be administered Nitroglycerin. The symptoms described, including breathing difficulty, left arm pain radiating to the right jaw, and low blood pressure, are indicative of a possible heart attack or myocardial infarction. Nitroglycerin is a medication commonly used to relieve chest pain or angina caused by reduced blood flow to the heart. It works by relaxing and widening blood vessels, improving blood flow and reducing the workload on the heart. However, it is important for a medical professional to properly assess the patient and make the final decision on the appropriate treatment.